Apparatus for operating stone-saws.



No. 654,852. Patented July 3|, I900.

G. E. SMITH. v APPARATUS FOR OPERATING STONE SAWS.

(Application fllgd May 17, 1899.)

3 Sheets-Sheet (No Model.)

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No. 654,852. Patented m 3|, I900.

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APPARATUS FOR OPERATING STONE SAWS.

(Appiication filegi May 17, 1899.) V

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(No Model.)

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No. 654,852. Patented July 3|, 1900.

G. E. SMITH.

APPARATUS FOR OPERATING STONE-SAWS.

(Application filed my 17, 1899.) (No Model.) 3 Sheets-Sheet 3,

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oHARLEs E. SMITH, or 'OHATTANOOGA, TENNESSEE.

APPARATUS FOR OPERATING- STONE-SAWS.

SPECIFICATION forming part of Letters Patent No. 654,852, dated July 31, 1900.

Serial N0. 7 l7,20 7. (No model.)

Application tier Mt msta of Tennessee, have invented certain new and useful Improvements in Apparatus for Oper-L ating Stone-Saws, of which the following is a specification The object of my invention is to provide improved apparatus for operating stone-saws;

and it consists in the combination and arrangement of parts set forth and claimed.

In the drawings, Figure 1 is a side elevation of a device embodying my invention; Fig. 2,

r 5 a top plan view of the mechanism on top of the main frame; Fig. 3, a horizontal section on line 3 3 of Fig. 1; Fig. 4, a detail view showing the mounting of the saw-frame; Fig. 5, a

sectional detail view showing the mechanism which causes the saw-frame to travel up or down; Fig. 6, a top plan view corresponding to Fig. 5 5 Fig. 7, a side. elevation of a sawblade, and Fig. 8 a. plan view corresponding to Fig. '7 Fig.' 9, a sectional view of the sawframe; Fig. 10, a side elevation, on an enlarged scale, of the mechanism which causes the saw-frame to travel up or down; Fig. 11, a perspective View of the same.

The reference-letter A denotes a support- 0 ing-frame; B and B,engine bed-plates mounted to slide vertically in .frame A, (land 0, engine-cylinders mounted on plates B and B;

respectively, and usedto operate the device," D, a saw-frame mounted to slide horizontally 5 on plates B and B; E and F, cog-wheels mounted on plate B so as to slide on vertical shafts G and H and adapted to be actuated by rack-bar d on saw-frame D; I, a beveled gear mounted on the upper end of shaft G;

0 K, a screw-gear mounted on the upper end of shaft H; L, a shaft operated by beveled gear I and operating shaft M; N, a worm gearwheel operated by screw-gear K and operating shaft M; O and O, shafts operated through 5 beveled gears on shaft M; and P I P P vertical, screw-threaded shafts mounted in the four hollow supporting-posts'aof'frame A and adapted to be operated by shafts M, O, and O and to raise or lower bed-plates B and B through screw-nuts 19..

The main frame preferably consists of four hollow channel-iron posts a, supported on :channel-iron'base-plates a and secured to gether and braced by channel-iron cross pieces a and T-iron braces a thus forming alight, strong, and portable supporting-frame for the device. The engine bed=plates B and B are each provided with supporting-brackets b, to which are secured screw-nuts Z7, engaging shafts P P, &c., so that upon operation of the shafts the bed-plates are carried up or down, according to the direction of rotation. In order to make the up-and-down motion of the bed-plates as frictionless as pos'-' sible, the brackets b are provided with rollers 11*, adapted to contact with the posts at. The engine-cylinders G and C are securely bolted to the bed-plates B and B, respectively, and the cylinder 0 supplied through an extensible supply-pipe c with steam, compressed air, or other actuating medium, which is perfectly exhausted into cylinder 0, through an extensible exhaust-pipe 0, so as to utilize the double expansion thereof. At each end the cylinders C and O are provided with pistonrods 0, which are connected with the sawframe I) by means of cross-heads d working through slots 17 in bed-plates B 13. frame D may be of any of the well-known con= structions, but preferably consists of channel-irons, and the saw-blades d are provided at one end with lugs (1 engaging the flanges of the channel-irons, and at their other ends withdogs (1 through which wedges d are driven to stretch the blades and hold them in position. The saw-blades 01 preferably consists of a blade provided with grooves d, which serveto carry the cutting material to the bottom of the cut in its full sharpness. In order to guide and support the saw frame, it is mounted upon rollers 19 on bed-platesB and B, which may be mounted upon ball or roller bearings to reduce friction. The cog-wheels E and F are rotatably mounted on brackets bf, attached to bed-plate B and loosely encompassing shafts G and H, so as to be unaffected by their rotation. To cogwheel E is attached a'plate. e, provided with an eXten sione, carryinga "double acti'ng'pawl 6 adapted to engage theratchet-wheel e which is rotatably supported on plate e and engages shaftE through its square or polygonal-shaped central opening, so that it is free to slide thereon, but causes the shaft to rotate with The saw it. The pawl e is pivotally mounted on ex tension e and has a polygonal-shaped base 6 adapted to be engaged by a pronged spring,

I I ratchet-wheelfiwhich is rotatably supported I on plate f and engages shaft F through its square orfpolygonal shaped central opening," so that it is free to slide thereon, but causes the shaft torotate with it. The pawl f is similar in all respects to ipawl e so it needs no further description. The cog-wheel F is provided with segmental slots f located outside the periphery of ratchet f and is pros vided with studs f which may be secured in any desired position therein, so as to engage extension f upon rotation of the cogwheel and cause plate f to rotate therewith. By adjusting studs f 'in slots f it will be seen that ratchet f may be caused to rotate through only a portion of the stroke of co wheel F. When" both studs are adjusted to contact with extension f, there will be no lost motion and the full stroke of the cog wheel will be utilized; but when thestuds are adjusted in their slots at some distance from the extension a corresponding portion of the stroke of the cog-wheel will be inoperative. The shaft G carries at itsupper end the beveled gear I, which through shaft L operates beveled gear m, mounted to loosely rotate on shaft M, andshaft H carries at its upper end the screw-gear K, which operates worm-gear to regulate the downward feed of the'sawframe at each stroke in accordance with the qualities of the stone to be sawed. By reversing the position of the pawls e or f 2 in "the above-described operations a. rapid or slow upward feed may be obtained, although it is thought that it will generally be'more desirable to use only the rapid upward'fe'ed. I claim in an apparatus for sawing stone- 1.. The combination, with the'supportingframe, of a saw-frame support adjustably mounted thereon; a saw-frame mounted to reciprocate on its support; a rack-bar carried by the saw-frame; a cog-wheel 'rotatably mounted on the saw-frame supportj and" adapted to be engaged'by lthe rack-bar; a shaft splined in the cog-wheel; mechanism,

connected with the shaft, adapted to actuate the adjusting mechanism of the saw-frame support; and means for reciprocating the sawframe on its support.

2. The combination, with thesupporting frame, of a saw-frame support adj'ustably mounted thereon; a saw-frame mounted to reciprocate on its support; arack-bar carried by the saw-frame; a cog-wheelrotatably N, also loosely mounted on shatt'lvl. Ulu tches m, splined to shaft M and simultaneously operated by lever m serve tolthrow either shaft. G or H into operative engagement with shaft M. Shaft M operates shaft 0 and 0 through beveled gears o and 0, which in turn actuate shaftsP P, 850., to raise or lower the engine bed-plates B and B through screw-nuts b.

The operation of the apparatus is as follows: The stone to be sawedisplaced under the saw-frame and supplied with water and cutting material in the usual way. Then the lever m is operated to throw shaft G into operative connection with shaft M and pawl e is thrown, as shown in Fig. 3, so that movement of the saw-frame from right to left will actuate shaft G,- while in the movement from left to right the pawl slides over the ratchet without aifecting shaft G. This operation utilizes the full stroke of the rack-bar on the saw-frame for a rapid downward feed, which is continued until the saw-blades come in contact with the-stone, at which point it.is desirable to decrease the rapidity of the downward feed. To this end shaft .H is thrown into operative connection with shaft M,'pawl the ad usting mechanism of thesaw-frame.

support; and an engine-cylinder, mounted on the saw-frame support, adapted to reciprocate the saw-frame on. its support. I p

3. The combination, with the supportingframe, of a, saw-frame supportadjustably mounted thereon; a saw-frame mounted to reciprocate on its support; means for reciprocating the saw-frame; a rack-bar carried'by. the saw-frame; a cog-wheel adapted to be actuated by. the rack-bar; a pawl-carrying plate rotatably mounted to travel with the Witnesses: l

BENJAMIN 'TRUXAL B. W. BARR. 

